Arabidopsis class II TCP transcription factors integrate with the FT-FD module to control flowering

编号 040020602

推送时间 20190930

研究领域 森林培育 

年份 2019 

类型 期刊 

语种 英语

标题 Arabidopsis class II TCP transcription factors integrate with the FT-FD module to control flowering

来源期刊 Plant Physiology

期 第206期

发表时间 20190624

关键词 class II TCP;  control flowering;  FT-FD module; 

摘要 The appropriate timing of flowering is critical for plant reproductive success. Although the FLOWERING LOCUS T (FT)-FD module plays crucial roles in the photoperiodic flowering pathway, the underlying mechanisms and signaling pathways involved still remain elusive. Here, we demonstrate that class II TCP transcription factors (TFs) integrate into the FT-FD complex to control floral initiation in Arabidopsis thaliana. Class II CINCINNATA (CIN) TCP TFs function as transcriptional activators by directly binding to the promoters of downstream floral meristem identity genes, such as APETALA1 (AP1). In addition, these TCPs directly interact with FD, a basic leucine zipper TF that plays a critical role in photoperiodic flowering, which further activates AP1 expression. Genetic analyses indicated that class II CIN TCP TFs function synergistically with FT and FD, to positively regulate flowering in an AP1-dependent manner. Thus, our results provide compelling evidence that class II CIN TCP TFs act directly at the AP1 promoter to enhance its transcription, thus further elucidating the molecular mechanisms underlying the regulation of photoperiodic flowering in Arabidopsis.

服务人员 孙小满

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